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EWG's Tap Water Database — 2019 UPDATE

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2,4,5-TP (Silvex)

Algonquin

2(2,4,5-trichlorophenoxy) propionic acid (2,4,5-TP or Silvex) is a cancer-causing herbicide banned in the U.S. in 1985 because of its toxicity. It is still detected as a groundwater contaminant in areas where it was sprayed or stored.

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND80ND
2013N/A00N/A
2014N/A00N/A
2015ND80ND
2016N/A00N/A
2017N/A00N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 3 ppb

The EWG Health Guideline of 3 ppb for 2,4,5-TP was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to internal organs.

EPA Maximum Contaminant
Level (MCL) 50 ppb

ppb = parts per billion

All test results

Date Lab ID Result
2012-07-232073147-01ND
2012-07-232073253-01ND
2012-07-232073256-01ND
2012-07-232073145-01ND
2012-11-152112240-03ND
2012-11-152112240-02ND
2012-11-152112240-04ND
2012-11-152112240-01ND
2015-07-275074813-03ND
2015-07-275074813-02ND
2015-07-275074813-04ND
2015-07-275074813-01ND
2015-10-145102492-04ND
2015-10-145102492-01ND
2015-10-145102492-02ND
2015-10-145102492-03ND